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a)
4(x-1)/(x-1) = 4
d)
x^2 - 4x + 4
x______-2
x______-2
(x-2)(x-2)
quedaría:
(x-2)(x-2)/(x-2) = x - 2
g)
diferencia de cuadrados.
(x+4)(x-4)/(x-4) = x + 4
i)
x^3 + 6x^2 + 12x + 8
por ruffini:
=(x+2)^3
en el problema:
(x+2)/(x+2)^3 = 1/(x+2)^2